diff -r 000000000000 -r f90c822e73f8 src/share/vm/runtime/compilationPolicy.hpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/share/vm/runtime/compilationPolicy.hpp Wed Apr 27 01:25:04 2016 +0800 @@ -0,0 +1,145 @@ +/* + * Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + * + */ + +#ifndef SHARE_VM_RUNTIME_COMPILATIONPOLICY_HPP +#define SHARE_VM_RUNTIME_COMPILATIONPOLICY_HPP + +#include "code/nmethod.hpp" +#include "compiler/compileBroker.hpp" +#include "memory/allocation.hpp" +#include "runtime/vm_operations.hpp" +#include "utilities/growableArray.hpp" + +// The CompilationPolicy selects which method (if any) should be compiled. +// It also decides which methods must always be compiled (i.e., are never +// interpreted). +class CompileTask; +class CompileQueue; + +class CompilationPolicy : public CHeapObj { + static CompilationPolicy* _policy; + // Accumulated time + static elapsedTimer _accumulated_time; + + static bool _in_vm_startup; +public: + static void set_in_vm_startup(bool in_vm_startup) { _in_vm_startup = in_vm_startup; } + static void completed_vm_startup(); + static bool delay_compilation_during_startup() { return _in_vm_startup; } + + // m must be compiled before executing it + static bool must_be_compiled(methodHandle m, int comp_level = CompLevel_all); + // m is allowed to be compiled + static bool can_be_compiled(methodHandle m, int comp_level = CompLevel_all); + // m is allowed to be osr compiled + static bool can_be_osr_compiled(methodHandle m, int comp_level = CompLevel_all); + static bool is_compilation_enabled(); + static void set_policy(CompilationPolicy* policy) { _policy = policy; } + static CompilationPolicy* policy() { return _policy; } + + // Profiling + elapsedTimer* accumulated_time() { return &_accumulated_time; } + void print_time() PRODUCT_RETURN; + // Return initial compile level that is used with Xcomp + virtual CompLevel initial_compile_level() = 0; + virtual int compiler_count(CompLevel comp_level) = 0; + // main notification entry, return a pointer to an nmethod if the OSR is required, + // returns NULL otherwise. + virtual nmethod* event(methodHandle method, methodHandle inlinee, int branch_bci, int bci, CompLevel comp_level, nmethod* nm, JavaThread* thread) = 0; + // safepoint() is called at the end of the safepoint + virtual void do_safepoint_work() = 0; + // reprofile request + virtual void reprofile(ScopeDesc* trap_scope, bool is_osr) = 0; + // delay_compilation(method) can be called by any component of the runtime to notify the policy + // that it's recommended to delay the complation of this method. + virtual void delay_compilation(Method* method) = 0; + // disable_compilation() is called whenever the runtime decides to disable compilation of the + // specified method. + virtual void disable_compilation(Method* method) = 0; + // Select task is called by CompileBroker. The queue is guaranteed to have at least one + // element and is locked. The function should select one and return it. + virtual CompileTask* select_task(CompileQueue* compile_queue) = 0; + // Tell the runtime if we think a given method is adequately profiled. + virtual bool is_mature(Method* method) = 0; + // Do policy initialization + virtual void initialize() = 0; + virtual bool should_not_inline(ciEnv* env, ciMethod* method) { return false; } +}; + +// A base class for baseline policies. +class NonTieredCompPolicy : public CompilationPolicy { + int _compiler_count; +protected: + static void trace_frequency_counter_overflow(methodHandle m, int branch_bci, int bci); + static void trace_osr_request(methodHandle method, nmethod* osr, int bci); + static void trace_osr_completion(nmethod* osr_nm); + void reset_counter_for_invocation_event(methodHandle method); + void reset_counter_for_back_branch_event(methodHandle method); +public: + NonTieredCompPolicy() : _compiler_count(0) { } + virtual CompLevel initial_compile_level() { return CompLevel_highest_tier; } + virtual int compiler_count(CompLevel comp_level); + virtual void do_safepoint_work(); + virtual void reprofile(ScopeDesc* trap_scope, bool is_osr); + virtual void delay_compilation(Method* method); + virtual void disable_compilation(Method* method); + virtual bool is_mature(Method* method); + virtual void initialize(); + virtual CompileTask* select_task(CompileQueue* compile_queue); + virtual nmethod* event(methodHandle method, methodHandle inlinee, int branch_bci, int bci, CompLevel comp_level, nmethod* nm, JavaThread* thread); + virtual void method_invocation_event(methodHandle m, JavaThread* thread) = 0; + virtual void method_back_branch_event(methodHandle m, int bci, JavaThread* thread) = 0; +}; + +class SimpleCompPolicy : public NonTieredCompPolicy { + public: + virtual void method_invocation_event(methodHandle m, JavaThread* thread); + virtual void method_back_branch_event(methodHandle m, int bci, JavaThread* thread); +}; + +// StackWalkCompPolicy - existing C2 policy + +#ifdef COMPILER2 +class StackWalkCompPolicy : public NonTieredCompPolicy { + public: + virtual void method_invocation_event(methodHandle m, JavaThread* thread); + virtual void method_back_branch_event(methodHandle m, int bci, JavaThread* thread); + + private: + RFrame* findTopInlinableFrame(GrowableArray* stack); + RFrame* senderOf(RFrame* rf, GrowableArray* stack); + + // the following variables hold values computed by the last inlining decision + // they are used for performance debugging only (print better messages) + static const char* _msg; // reason for not inlining + + static const char* shouldInline (methodHandle callee, float frequency, int cnt); + // positive filter: should send be inlined? returns NULL (--> yes) or rejection msg + static const char* shouldNotInline(methodHandle callee); + // negative filter: should send NOT be inlined? returns NULL (--> inline) or rejection msg + +}; +#endif + +#endif // SHARE_VM_RUNTIME_COMPILATIONPOLICY_HPP